Statelessness requirement in Rest API - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the statelessness requirement mean in REST APIs?

It means each request from a client to the server must contain all the information needed to understand and process the request. The server does not store any client context between requests.

beginner

Why is statelessness important in REST APIs?

Statelessness helps servers scale easily, improves reliability, and simplifies server design because the server doesn't need to remember past requests or client sessions.

intermediate

How does a client maintain session information if REST APIs are stateless?

The client must send all necessary session data with each request, often using tokens like JWT or cookies, so the server can authenticate and process the request without storing session data.

intermediate

Which of these violates the statelessness requirement?<br>

Server stores user login status in memory between requests.

Storing user login status in server memory between requests violates statelessness because the server keeps client state instead of requiring the client to send all info each time.

beginner

Give a real-life example to explain statelessness in REST APIs.

Imagine ordering coffee at a counter. Each time you order, you tell the barista exactly what you want without relying on them remembering your previous orders. Similarly, REST APIs require each request to have all needed info.

What must a REST API request include to satisfy statelessness?

A All information needed to process the request

B Only the user ID

C No information, server remembers everything

D Only authentication token

Each request must include all information needed because the server does not keep client state.

Which is a benefit of statelessness in REST APIs?

A Easier server scaling

B Server stores user sessions

C Server remembers client history

D Requests depend on previous ones

Statelessness allows servers to handle many requests independently, making scaling easier.

If a server stores client session data between requests, what does this mean?

A It follows statelessness

B It violates statelessness

C It improves REST principles

D It is required for REST

Storing session data on the server breaks the statelessness rule.

How can a client maintain authentication in a stateless REST API?

A Use server-side sessions

B Server remembers login after first request

C Send authentication token with each request

D No authentication needed

Clients must send tokens like JWT with every request to authenticate without server session.

Which analogy best describes statelessness?

A Barista remembers your last order

B You don’t tell the barista what you want

C Server keeps your order history

D Ordering coffee each time with full details

Each request must be complete, like ordering coffee with full details every time.

Explain the statelessness requirement in REST APIs and why it matters.

Think about how each request is independent.

Describe how clients handle session or authentication data in a stateless REST API.

Remember the server forgets everything after each request.